Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5c95165c8cd22f5…

MALICIOUS

PDF

39.4 KB Created: 2021-05-22 07:06:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c1cce063c4a010004cef20c08dd16d85 SHA-1: 3b9a19bd27c128863b51f745dc8f723ed0c26bd0 SHA-256: d5c95165c8cd22f537a74abb4fdf7f65eaee4671993e3b7f021e2c87f3c5fec0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically promoting "game hacks" and "free spins" for Coin Master. The ML classifier also flagged the PDF as malicious. The embedded URLs and the heuristic firings strongly suggest a phishing or scam attempt designed to lead users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8060

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://netcdn.xyz/app/406889139/coin-master-claim-free-spins-game-hack In PDF document text
    • http://sv-nahetal.de/images/roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://sv-nahetal.de/images/free-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • http://sv-nahetal.de/images/coin-master-hacks-and-cheats_GM406889139.pdfIn PDF document text
    • http://sv-nahetal.de/images/free-roblox-avatar-ideas_GM431946152.pdfIn PDF document text
    • http://sv-nahetal.de/images/coin-master-unlimited-free-spins_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003432.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3432 25460 bytes
SHA-256: 36cfcf5c777e7393f4d67dc698a58c0559a7e1bda7cd567cb1d2cff0e812c4e9
font_01_sfnt_off00006f3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F3B 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off000078ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78EC 18220 bytes
SHA-256: 4508a7247666ecd7f475af3e2510e2d7297b60fda6d209b486c2dc6be28a63e8

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